Window-screen.



110.882.578. PATENTED MAR124, 19o8.-

P. BURCKHARDT.

WINDOW SCREEN.

APrLIoATIox FILED 001210, 1901.

HFT

l y "E 4 FF INIIIl mm1 :mlnmlm umu-1mi u z Munn-MMIII!! I y 31ml! Amirif tilation of the room controlled, and view into tains a vertical openslot 4 extending downis secured a sheet 9 of wire fabric made ofentering into a room through a window convation of portions of thefabric of my screen.

FREDERICK BURCKHARDT, OF ST. CHARLES, MISSOURI.

WINDOW-SCREEN.

Specification of Letters Patent.

Patented March 24, 1908.

Application led October l0, 1907. Serial No. 396,784.

To all whom it may concern:

Be it known that I, FREDERICK BUROK- HARDT, a citizen of the UnitedStates of America, residing at St. Charles, in the county of St. Charlesand State of Missouri, have invented certain new and useful Improvementsin VVindow-Screens, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, formingpart of this specification.

My invention relates to an improvement in window screens and it has forits object the construction of a double screen of this kind7 whereby theamount of air and light taining the screen may be regulated., the ventheroom obscured when so desired.

Figure I is an elevation of my screen with portions of its frame shownin section. Fig. II is in part an edge view and in part a vertical crosssection taken on lines II-II, Fig. I. Fig. III is in part a top or planview and in part a horizontal section taken on line III-III, Fig. I.Fig. IV is an enlarged ele- Fig. V is a vertical section taken on lineV-V, Fig. IV.

The casing A of my screen comprises a bottom channel bar 1, side channelbars 2 and outer and inner top bars 3 and 4. The bottom bar contains avertical slot 1 located in its inner wall and projecting from said wallabove the slot is an arm 1a containing a vertical hole. The side barsare preferably widened gradually from the bottom to the top of thecasing. The inner top bar 4 conwardly from the upper edge of the bar andthe upper end of which is closed by a detachable guard strip 5.

6 designates the frame of a stationary screen that is immovably mountedin the casing A and has secured to it a sheet 7 of wire fabric made offlat wires or strips and produced in such manner as to present a flatsurface at the inner face of the screen.

8 is the frame of a movable screen to which fiat wires or strips andproduced in such manner as to present a flat surface at the rear side ofthe screen facing the sheet of the fixed screen and adapted to 'fitclosely thereagainst, both when the movable frame is at rest or movedalong the face of said fixed screen. The frame of the movable screen isprovided at its lower end with an arm 10 that extends through the slot 1in the bottom bar of the casing A beneath the arm la.

11 is an adjustment screw having a smooth portion of its shank looselyfitted in the hole in the arm l1 and its screw threaded portion disposedin the arm l() of the movable screen frame. This screw has the utilityof raising and lowering the movable screen within the casing A for thepurpose of shifting the flat wires or strips of the movable screen sothat they will close or partially close the mesh of said stationaryscreen to regulate the passage of air or light through the entire windowscreen or obscure a view therethrough. When, therefore, the screen isused in the window of a building, it provides for the admission ofanydesired amount of air through the entire eXten-t of the screen andthe screen may serve the purpose of an awning to eX- clude the hot raysof the sun during the heat of summer days.

To provide for ventilation of a room in a window of which my windowscreen is used, I incorporate in the screen the following parts: l2 isan adjustment screw having a head 18 secured in the top of the frame 8of the movable screen and which extends through the slot 4 in the innerto bar 4 of the casing A. 14 is a set nut on tlie adjustment screw l2that is provided with an annularly grooved shank 15 which is looselyfitted in the slot 4/ and has engagement with the top bar 4. When saidset nut is rotated on the screw 12 it acts to shift the screw and causeit to draw the movable screen away from the stationary screen so thatair which passes through the stationary or outer screen may rise betweenthe two screens and obtain ingress into the room when the movable screenis in a position to cause its wires to a proximately prevent the passageof air and ight through the two opposing sheets of Wire fabric andobscure a view through the screen.

AI claim:

l. A Window screen comprising a stationary screen having flat wirefabric, and a movable screen having flat wire fabric oppos-` ing saidflat wire fabric of the stationary screen and shiftable to close themesh in the flat Wire fabric therein.

2. A window screen comprising a stationary screen containing flat wirefabric having a flat face, and a movable screen containing flat wirefabric having a flat face opposing the flat face of the fiat wire fabricof the stationary screen; said movable screen being shiftable to closethe mesh in the flat wire fabric of the stationary screen.

3. A window screen comprising a stationary screen containing flat wirefabric, and a movable screen containing flat Wire fabric and opposingsaid flat wire fabric of the stationary screen; said movable screenbeing shiftable to close vthe mesh in the flat wire fabric `of saidstationary screen.

4. A window screen com rising a casing, a screen having flat wire favric and secured to said casing, and a second screen having flat Wirefabric and movably mounted in said casing and shiftabl'e to close themesh of the flat wire fabric in said first named screen,

45. A window screen comprising a casing, a screen having flat wirefabric and secured to said casing, a second screen having flat wirefabric and movably mounted in said casing and shiftable to close themesh of the fiat wire fabric in said first named screen, and means formoving said second screen, substantially as set forth. v

6. A window screen comprising a casing, a screen having flat wire fabricand fixed to said casing, a second screen having flat wire fabric andloosely fitted within said casing, and means coperable with said 'casingand movable screen whereby said movable screen may be moved relative tosaid first named screen and along the face thereof, substantially as setforth.

7. A window screen comprising a casing, a screen having flat wire fabricand vfixed to said casing, a second screen having flat wire fabric andloosely fitted in said casing and operable in a part of said secondscreen to move the second screen along the face lof the first namedscreen, substantially as set forth.

8. A Window screen vcomprising a casing, a screen fixed to said casing,a second screen loosely fitted in said casing and having an armprojecting through a Wall of the casing, and an adjustment screw looselymounted in a part of said casing, and operable in the arm of said secondscreen for the purpose of shifting said second screen along the face ofsaid first named screen, substantially as set forth.

9. A window screen comprising a casing, a screen fixed to said casing, asecond screen movably fitted in said casing and opposing said firstnamed screen, means for moving said second screen along the face of saidfirst named screen, and means for moving said second screen away fromthe face of said first named screen, substantially as set forth.

10. A window screen comprising a casing, a screen fixed to said casing,a second screen movably fitted in said casing and opposing said firstnamed screen, means for moving said second screen along the face of saidfirst named screen, and means for moving said second screen away rfromthe face of said first named screen; said last named means comprisingadjustment members mounted in said casing and connected to said secondscreen, substantially as set forth.

11. A window screen comprising a casing, a screen fixed to said casing,a second screen movably fitted in said casing, and opposing said firstnamed screen, means for moving said second screen along the face of saidfirst named screen, and means for moving said second screen away fromthe face of said first named screen; said last named means comprising anadjustment screw connected to said second screen, and a set nut looselymounted in said casing and fitted to said adjustment screw,substantially as set forth.

FREDERICK BURCKHARDT.

In presence of:

ERNST ROBYN, B. L. EMMoNs.

